18789220

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{15401}}^1$

素因数の和:15471

約数の個数: 24

約数和(自身を含む): 40106808

約数和(自身を除く): 21317588

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 15401, 30802, 61604, 77005, 154010, 308020, 939461, 1878922, 3757844, 4697305, 9394610, 18789220]

約数ペア:

[(1, 18789220), (2, 9394610), (4, 4697305), (5, 3757844), (10, 1878922), (20, 939461), (61, 308020), (122, 154010), (244, 77005), (305, 61604), (610, 30802), (1220, 15401)]